300 Blackout 220gr Extreme Expanding King Kong Collection, 20ct
$39.99
The Acri Ammunition King Kong Collection .300 AAC Blackout 220gr Maker REX is a purpose-built subsonic expanding load engineered for shooters who demand maximum terminal performance from suppressed and short-barrel platforms. Built around the Maker Bullets 220gr REX (Rapid EXpanding) solid copper projectile, this round delivers devastating expansion, deep penetration, and near-perfect weight retention—all while remaining quiet, controllable, and precise.
6 in stock
Description
Acri Ammunition King Kong Collection
.300 AAC Blackout – 220gr Maker REX (Rapid EXpanding) Subsonic
The Acri Ammunition King Kong Collection .300 AAC Blackout 220gr Maker REX is a purpose-built subsonic expanding load engineered for shooters who demand maximum terminal performance from suppressed and short-barrel platforms. Built around the Maker Bullets 220gr REX (Rapid EXpanding) solid copper projectile, this round delivers devastating expansion, deep penetration, and near-perfect weight retention—all while remaining quiet, controllable, and precise.
This load has been range tested from a 7.5″ barrel, producing an average velocity of 1016.1 FPS, placing it squarely in the optimal subsonic performance window.
⚠️ 1:7 twist or faster REQUIRED (1:7, 1:6, 1:5 recommended)
Bullet Technology – Maker REX (Rapid EXpanding)
The Maker 220gr REX is a CNC-machined, solid copper, lead-free expanding projectile designed specifically for subsonic .300 AAC Blackout. Unlike traditional subsonic bullets that rely on yaw or fragmentation, the REX is engineered to expand reliably at low velocities while retaining nearly 100% of its original mass.
Key bullet design characteristics include:
Precision hollow-point cavity optimized for subsonic expansion
Expansion to nearly 3× original diameter
Structural integrity maintained through expansion
Straight-line penetration with large permanent wound channels
Key Specifications:
Caliber: .300 AAC Blackout
Bullet Weight: 220 Grain
Bullet Type: Maker REX (Rapid EXpanding)
Material: Solid copper (lead-free)
Velocity Class: Subsonic
Tested Velocity: 1016.1 FPS (7.5″ barrel)
Minimum Expansion Velocity: ~900 FPS
Maximum Velocity: 1120 FPS (do not exceed)
Required Twist Rate: 1:7 or faster
Series: King Kong Collection
Condition: New, factory-loaded ammunition
Performance Characteristics:
Expansion & Penetration
Designed to expand at subsonic speeds, the 220gr REX produces dramatic expansion and deep penetration. Ballistic gel testing shows large wound cavities with consistent expansion and excellent weight retention—making it exceptionally effective for close-range hunting and defensive use.
The Acri Ammunition King Kong Collection 220gr REX represents the pinnacle of subsonic .300 Blackout performance—combining modern solid-copper bullet engineering with precision loading for shooters who refuse compromise.
Quiet. Brutal. Purpose-Built.
⚠️ Use only in firearms chambered for .300 AAC Blackout. Follow all local, state, and federal laws.
Additional information
| Caliber/Gauge | .300 AAC Blackout |
|---|










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